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Abstract

The device develops electrostatic images on surface 12 of imagebearing member 10, where impression member 43, coated with electroscopic particles 41, is impressed against surface 12.

Country

United States

Language

English (United States)

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Development of Electrostatic Images

The device develops electrostatic images on surface 12 of imagebearing
member 10, where impression member 43, coated with electroscopic particles
41, is impressed against surface 12.

Electroscopic particles 37 are fed from hopper 33 by metering device 34 onto
rotatable roll 45 and then onto a second roll 43. The particles 41 on the surface
of roll 43 are impressed against the surface 12 of drum 10 having electrostatic
images 9 on it. The developing images 18 are transferred to print medium 19
where they are fixed in a fixing station 23 by application of heat. Potential,
applied from source 56 through conductors 55 and 57 to drums 43 and 10,
controls the rate and quantity of particles transferred from roller 43 to surface 12
of drum 10.

Electrostatic images are formed on surface 12 by corona discharge device
13, which applies an electrostatic charge uniformly over surface 12, and a photo
image projector 15 and 16. This selectively dissipates the electrostatic charge in
the portions of surface 12 which are exposed to light. Particles 18 which remain
on the surface of drum 10 are cleaned by brush 26 at cleaning station 25.